Internal-combustion engine.



C. W. WEISS.

INTERNAL COMBUSTION ENGINE,

APPLICATION FILED MAR.10.191L

w mm m J I v &

E Aw CARL W. WEISS, OF .BRDOLKLYN, NEW YOliK.

INTERNAL-COMBUSTION ENGINE.

To all whomit'maiv concern. K g Beit known tiat I, ChRL Wn 1ss,;a citizen of the United States, residing 1n. the

borough of Brooklyn of the-city'of New York, in the State of NeW York, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification, reference being had to the accompanying drawings, forming a. part hereof.

This nvention relates to internal combustion engines, particularly those of the multicylinder-oilburning type, and is concerned especially -vvi thJ-thc starting and reversing mechanism therefor where the starting. and

reversing is'cfl'ected by a compressed medium 7 such as air.

In oil burning engines, it. is the. commonpractice to lead the air from a reservoir through a. dlstrlbuter and into the cylinders, but no provision has been madefor a return connection between the cylinin-elevation', s z bctvveenjfthe-en me" and thestartmg mecha-. nism ders andthereservoir by which excessive pressures ,withinthe cylinders might be availed of to replenish the pressure With n the reservoir, and in which suitable aute- Il'lillIlCI-Eflllfli manual relief-valves might be disposed for the relief of the'excessive pressures within the; cylinders Without, however, relieving the stored )ressure of the air in the reservoir. The 0 ject ofthe present invention is to provide in association with compressed air starting mechanism of known t pe suitable automatic and manual relief.

evices for pressures Within the cylinders wlri'clrdevices shall be disposed operatively in a r'etum connection between the cylinders and. the'compress'ed air reservoir and shall be so relatedztdthe reservoir and to the cylinders asto-in'sure thei'r 'functioning in the intended-mannerlander all conditions of use. The d ils, of. the invenfiionwillappear in connection .with' the following description of the preferred embodiment of theinven tion-shown: in the accompanying drawings, I

in which- F1 are 14s a v ew-1n perspectlve of an engine equipped "with the improved mechan v ew on a somewhat Fig. 2 .3... detail vi:

ctionand partly larger scale,

Specification of Letters Patent.

. for each of the cylinders a,

Which opens under .1.

owin the-operative"relation.

r the'prescnt improvements are designed p m arily with Patented J an. 22, 191.8.

Application filed March 10, 191.7. Serial No. 153,802.

four-cyhmler oil burning engine, into the cylinders a of which fuel may be injected 1n any desired manner. 1n the walls, of each of the cylinders a, preferably near the head a, is formed a port a for the admis.

sion of compressed air which. is led to the ports from a reservoir 6 through pipes c and a distrihuter d,- past a check valve 6 seated in a manifold f which is provided The distributer (Z may be driven through a spiral gear d by a gear d on the crank shaft of the en gins whereby airis led from the reservoir 6 into the cylinders a in proper sequence for driving according to the desired direct-ion of rotation ofthe crank shaft. '1 hemechan in thus far described may be considered as typical of compressed. air sta rt-ing devices for oii engines. In such devices, however, no provision has been made for the repleniishing; of the pressure witi'iin the reservoir 5 directly from the enginecylinders, 01, nor has any relief been. provided for excessive pressures within the cylinders a or in the reservoir 6. Again, no means for relieving pressures within the cylinders a, as when it is desired to admit compressed air for starting the engine, under the ready control of the o orator, isgenerally includedin mechanism. 0' this character. =In accordance with the present invention there is provided a return connectiong, g from earl-1 of the manifolds a valve cage h in which is seateda spring ressed check valve H which is rmrmally eld seated under the pressure of the air in thereservoir b. Betweengach of the manh folds f and thecommonrctiirn pipe gi, there is interposed a sprin%-pressed chc'ch valve' c. linders-o. On each ofthe manifolds f t ereare mounted separate; valve cages'z' 111 "each of whichis seated a gspril g-pressed check valve '5 which is subjected to pressure 1e pressures within the Within the return pipe 9, but protected from the direct pressure the cylinders a a bythe corres I manifold f. To valves-i may open freely,

ondingcheck valve f in its under the influence of excessive pressures in the return pipe 9 and may beopened manually' by means of rocker arms is carried on a rocker shaft k and adapted to engage, respectively, collars i carried on the ends of the valve stems. The rocker shaft is may be journaled on the valve cages 'z' and provided at one end with a rocker; arm It-{and pullcord k" disposed within reach of the operator whereby upon rocking of the shaft is all of the valves 71' are lifted simultaneously. In the valve cage h is formed a seat'h' for a spring-pressed safety valve h which is subjected directly to the pressure of the air in the'reservoir b but is not normally subjected to the direct pressure in the return pipe 9 by reason'of the interfan 'sider the runmn and the unsatis actory if not dangerous,

position of the check valve H.

The air in the reservoir 6 may be forced therein under pressure by means of a suitable "compressor Z" geared to the crank shaft of the engine and communicating with the reservoir through ,2. pi e tp which is connectedto the section 9 o the return pipe at S0128 point between the reservoirpnd the cae-..

her an understanding of the importance of the improvements it is necessar to conconditions of t e motor conditions which may arise by'reas'on of the relation of the starting mechanism to the p engine. In the first place, it is evidently de-.

' sirable that when the compressed air isgadmitted to the cylinders,these cylinders shall be free from any air which might exert a counter ressure on the starting air and so oppose the starting, whatever he the direc tion. To permit the ready relief of such stored pressures within the cylinders the rocker arms In in their operative relation to A the respective check valves i are provided;

, nal'release of the The operator by grasping the pull cord In may-lift all of the check valves i from their seats and so permit pressures within the cylinders a to escapeflpast the check valves f and the said relief valves 2''; Other conditions than those required for starting may make it desirable to provide this quick manpressures within the cylinders', .Aftcr starting it. may be assumed that the air is cut oil" from the cylinders whereupon the compressor 1 will constantly force airinto the reservoir '6. At the same time,v part of the pressure within the cylinders may'bc communicated to the reservoir 6 past the check valves f, H, 'until the pressure within. the reservoir 6 has reached its maximum. During this time the return of such pressure to the cylinders is prevented by means at the check valve H. When the pressure in the reservoir b has rea'ched its maximum and further pressure 18 applied -means of the excess pressure may be-relieved automatically pastthe-check valves 2'. The devices for operating the check valves manually do not interfere with the-automatic unseating of these valves. under excessive pressures. Again, a dangerous condition may arise in the cylinders by reasoniof careless control at the air and its admission to the cylinders with fuel and at such times as to bring about an excessive ncrease in the mean effective pressures w1th1n thecyhnders. It is concelvable that these pressures nnght arise to a dangerous point and to meet this situation automatically the relief valves 2", 11. are so located as to open automatically at any de sired predetermined pressure depending on the adjustment of their springs. The conditions described herein are merely illustrative of those which it is desirable to meet by present improvements to the starting apparatus but it 1s to be understood that other conditions 'may arise in which the automatic and manual reliefs herein disclosechare of equal importance.

I claim as my invention:

'1. In an internal combustion engine in combination with aworking cylinder, :1 source of compressed starting medium,'a valve tov control the admission of the medium to the cylinder, a return connection from the cylinder to the source a check valve to prevent the return flow oi the compressed medium through said. connection from the source, and a manual relief valve communicating with said'conncction at a. point between the said check valve and the cylinder. ,2; 'In an' internal combustion engine in combination with a working cylinder, a source'of compressed starting medium, a valve-to control -the admission. of the medium to the cylinder, a return connection from the cylinder to the source, a check valve to prevent the return flow of the com pressed medium through said connection, from the source and a combined automatic andmanual relief valve communicating with said connection at a point between the said check valve and the cylinder.

3. In a'multicylinder internal combustion valve to control the admission of the air to the cylinders, a common return connection from the cylinders to the source, two check valves nterposed In said connection to pre vent the return flow of the air through the connection to the cylinders'and a combined automatic and manual relief valve in the connection betvveensaid' check valves.

4;.- In' a multlcylmder mternal combustion 1 engine. in combination with the working cylinders thereof, a source of compressed air for starting, a valve to'control the admission of the air to the cvlinders, a common return event the return flow of connection from the cylinders to the source,

two check valves in the connection to precompressed an:

through the connection to the oylindere a combined automatic and manual relief vaive communicating with the connection at a of March, A. D. 1917. v I I W CARL W5 WEISS. 

